import Vue from 'vue'
import VueRouter from 'vue-router'

// import Login from '../components/Login.vue'
const Login = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Login.vue')
// import Home from '../components/Home.vue'
const Home = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Home.vue')
// import Welcome from '../components/Welcome.vue'
const Welcome = () => import(/* webpackChunkName: "login_home_welcome" */ '../components/Welcome.vue')


// import Users from '../components/user/Users.vue'
const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/user/Users.vue')
// import Rights from '../components/power/Rights.vue'
const Rights = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/power/Rights.vue')
// import Roles from '../components/power/Roles.vue'
const Roles = () => import(/* webpackChunkName: "Users_Rights_Roles" */ '../components/power/Roles.vue')


// import Cate from '../components/goods/Cate.vue'
const Cate = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Cate.vue')
// import Params from '../components/goods/Params.vue'
const Params = () => import(/* webpackChunkName: "Cate_Params" */ '../components/goods/Params.vue')


// import GoodsList from '../components/goods/List.vue'
const GoodsList = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/List.vue')
// import Add from '../components/goods/Add.vue'
const Add = () => import(/* webpackChunkName: "GoodsList_Add" */ '../components/goods/Add.vue')

// import Order from '../components/order/Order.vue'
const Order = () => import(/* webpackChunkName: "Order_Report" */ '../components/order/Order.vue')
// import Report from '../components/report/Report.vue'
const Report = () => import(/* webpackChunkName: "Order_Report" */ '../components/report/Report.vue')

Vue.use(VueRouter)

const routes = [
  { path:'/', redirect:'/login' },
  { path:'/login',component:Login },
  { 
    path:'/home', 
    component: Home, 
    redirect: '/welcome',
    children:[
      { path:'/welcome',component: Welcome },
      { path:'/users',component: Users },
      { path:'/rights',component:Rights },
      { path:'/roles',component:Roles },
      { path:'/categories',component:Cate},
      { path:'/params',component:Params},
      { path:'/goods',component:GoodsList},
      { path:'/goods/add',component:Add},
      { path:'/orders',component:Order},
      { path:'/reports',component:Report},
    ] 
  },

]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //  next() 放行 next('/login') 强制跳转
  //---------------------------------------------
  //如果用户访问登录页，直接放行
  if(to.path == '/login') return next();
  //从sessionStorage中获取到保存的token
  const tokenStr = window.sessionStorage.getItem('token');
  //如果没有token，强制跳转到登录页
  if(!tokenStr) return next('/login')
  next()
})

export default router
